My stupid TV keeps loosing it's ability to play videos. We don't have cable or satelite, we use the TV for watching movies on the DVD player and VCR. If you accidentally hit the channel button instead of volume it tells you the TV is no longer receiving a signal and will shut off in 9 minutes. I have no idea how to get back to the channel that actually plays the movies. I don't have a manual because it was used when we purchased it and the menu doesn't give a clue what to do.